A single use case with a more thoughtful privacy model would have a hard time selling customers on it.

They'd have to convince those customers about how their service is architected differently and why that's good.

Unless the use case is massive, it's probably not worth it for a user to know about it.

But imagine a platform with radically better privacy characteristics.

All of the use cases on that platform get to draft off the user's diffused understanding of the improved privacy model.